I have not used one.
A gal I know said that her son bought a new e-bike. He put an Air Tag on it. It was stolen. (This is in USA, upper midwest, major large city.) Air Tag said his bike was in a dangerous part of town. He reported to the police where his Air Tag said it was. Police said they do not bother with bicycles. He went to try to find it. Found it in a trash pile. She did not say if it was worth recovering or it is was destroyed, so I do not know if he still had a working bike or not.